linux-kernel - Re: [PATCH 0/9] x86 idle cruft removal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <alpine.LFD.2.02.1104010020280.2797@x980>
Date:	Fri, 01 Apr 2011 00:24:08 -0400 (EDT)
From:	Len Brown <lenb@...nel.org>
To:	x86@...nel.org
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH 0/9] x86 idle cruft removal - v2

Thanks for the review feedback that this change is too sudden.
How about this plan with a 4-month delay?

cheers,
-Len Brown, Intel Open Source Technology Center

2.6.39-rc1
----------

x86 idle: deprecate floppy disable_hlt
	feature-removal.txt for 2.6.40 (4 months)
	WARN_ONCE on use
	cc: stable@...nel.org

x86 idle APM: deprecate apm_cpu_idle
	feature-removal.txt for 2.6.40 (4 months)
	#warning on CONFIG_APM_CPU_IDLE remove in 2.6.40
	WARN_ONCE in apm_cpu_idle()
	cc: stable@...nel.org

x86 idle: export pm_idle only for CONFIG_APM_MODULE
	like we do for default_idle(),
	EXPORT_SYMBOL(pm_idle) only on CONFIG_APM_MODULE

x86 idle: deprecate "no-hlt" cmdline param
	feature-removal.txt for 2.6.40 (4 months)
	cc stable@...nel.org
	WARN_ONCE if used, ask if idle=poll is sufficient
	same as idle=poll, except no-hlt also disables
		HLT in machine_halt().

x86 idle: deprecate "idle=mwait"
	feature-removal.txt for 2.6.40 (4 months)
	cc stable@...nel.org
	WARN_ONCE on invocation

x86 idle: re-name ce1_idle
	rename for clarity, no functional change

2.6.40-merge
------
x86 idle: move mwait_idle_with_hints()
	out of process.c to cstate.c, make static

x86 idle floppy: remove deprecated disable_hlt/enable_hlt

x86 idle: delete deprecated idle=mwait
	default_idle() can use HLT

cpuidle: add cmdline "cpuidle=off"
	allow falling back to native default_idle

x86 idle xen: stop touching pm_idle and default_idle
	Xen Dom0 kernel only needs HLT, but include
	CPU_IDLE, ACPI etc for running on bare hardware.
	So when running in Xen Dom0 mode, disable cpuidle
	to fall back to default_idle.

x86 idle APM: remove deprecated apm_cpu_idle()
	and its use of pm_idle

x86 idle cpuidle: delete public use of pm_idle
	make pm_idle and default_idle static to process.c
	add return value from cpu_idle_call()
	invoke cpu_idle_call from cpu_idle() rather than via pm_idle

	cpu_idle() {
		...
		if (cpu_idle_call())
			pm_idle();	/* non cpuidle default */
	}

x86 idle: remove "no-hlt" cmdline param
	remove deprecated "no-hlt"
	use idle=poll instead

x86 idle: remove cpuinfo_x86.hlt_works_ok flag
	it became a NOP when "no-hlt" was removed

x86 idle: remove hlt_works()
	it became a NOP when cpuinfo_x86.hlt_works_ok was removed
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/